Molding-machine.



H. C. AYERST.

MOLDING MACHINE.

APPLICATION min um. 1s. 1915.

LG. Patented Nov. 20, 1917. h

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WIM/58858; 36 /m/E/vo ,4 TTOBWEY H. C. AYERST.

MOLBING MACHINE.

APPLICATION FILED IAN. Is. 1915.

Patented Nov. 20, 1917.

2 SHEETS-SHEET 2.

Cf Ayens't HARRY c. AYnnsT, or SEATTLE, WASHINGTON, AssIGNon To SANITARY PULP PRODUCTS COMPANY, F SEATTLE WASHINGTON.

, 'WASHINGTON, A QQRPORATION 0F HOLDING-MACHINE.

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Specification of Letters Patent.

Patented Nov. ao, aait.

Application filed January 16, 19-15. Serial No. 2,531.

To all whom t may concern.' v

Be it known that I,HARRY C. Arnn'sr, a citizenof the United States, residing at Seattle, in the county of King and State of Washington, have invented certain new and useful Improvements in Molding-Machines, of which the following is a specification.

This invention relates to certain improvements in. moldin machines, and its main object is to provi e a machine of this character for producing caps for bottles and devices of a similar nature, although it may be used in the manufacture of other objects such as dishes, or the like.

A further object of 'the invention is to construct a molding machine which is automatic in its action and provided with mechanism for feeding the material into the molds and for discharging the finished articles from the machine.

With these ends in view, the invention Y consists in the novel construction, adaptation and combination of parts, as will be hereinafter described and claimed.

In the accompanying drawings, Figure 1 is a side elevation, shown partly n section, of an automatic molding machine embodying my invention'. Fig. 2 is a plan view of the same with the drying oven omitted. Fig.

3 is a fragmentary transverse vertical section of the rotary wheel or mold-carrier and the material feeding and pressing appliances illustrated in inoperative positions. Fig. 4 is a view substantially similar to Fig.

3 with the referred to appliances 1n 'operative positions with respect to the wheel. Fig 5 is a sectional view through 5-5 of Fig. 1. Fig. 6 is a view showing in transverse ver# 'tical section the upper portion of a milk bottle with a cap such as manufactured by the invention applied thereto.

The machine, as illustrated, is designed to produce from paper pulp, or the like, a cap which, as best shown in Fig. 6, is formed with a central depressed portion A to lit within the mouth B of bottle C and has an annular channel D to accommodate vthe bottle-rim E. Said cap is also provided with a peripheral ange F which is turned in as indicated by broken lines f, to embrace. the bulbular portion G of the bottle-head when the cap is to be secured.

In carrying out my invention, I provide a wheel 10 which is mounted for rotation on a shaft 11 journaled in bearing boxes 12 profrom a power shaft,

v ided on the frame base-members 13. Pro-- vided in the of said wheel is a plurality of spaced cavities 14constituting the moldsI in which the caps are formed. vAs shown in Fig. 3, each mold is of a substantially 6o circular shape having at its inner end an annular groove 15 and centrally thereof a tapering recess 16 to receive the head or stripper element 17 having a stem 18 which extends radially through the wheel rim. At the end of a stem remote from its head is a linger 19 extending through a slot 191 of the wheel so as to engage, upon occasion,la stationary cam attachment 20 (Fig. 1') of the frame to urge the head 17 radially out- 70 -wald in opposition to a spring 21.

Secured on the shaft' 11 is a ratchet wheel 22v which-is engaged by a spring-pressed pawl 23 carried by a vibratory arm 24 loosely mounted on said sha Y 75 Said arm is connected by a rod 25with a crank-pin 26 of a shaft 27 which is driven from a counter-shaft 28 by means of a chainbelt 29 assing about sprocket wheels 30 and 31 on t e respective shafts. rlhe shaft 28 80 may be rotated by any suitable means, as by a belt, not shown, through the medium of a belt-pulley 32 mounted on the shaft 28.l

@n shaft 27 is an eccentric 33 to afford re- 85 ciprocatory motion to a bolt 34 which operates through a guide 35 to temporarily lock the wheel in predetermined rotary positions by engaging in socketsbetween spaced lugs 36 provided on-the wheel. 90

Supplemental to the locking bolt 34 is provided a latch 37 operable in a guide frame 38 and pressed by a spring 39 against the lugs 36 so as to enter the referred to sockets as the latter are successively presented in 9 5 the rotation of the wheel. The functionof said latch is to exercise a resistance to the turning of the wheel and to arrest its rotary movements thereof so that the lugs 36 will not occupy positions to interfere with the operation of the bolt 34. l

40 represents an oven casing inclosing. a portion of the wheel rim and is heated by hot air passing through supply and discharge pipes 41 and 42.

Located above the wheel is a guide 43 for a tubular plunger 44 whose upper endA is connected to a flexible pipe 45 bywhich pulpy material is conducted to the chamber within the vplunger 44. The lower end of chine die.

thereof, the plunger is providedin its circumference with discharge openings 46.

V Slidably itted to the outer periphery of the plunger is a sleeve47 which, with the lower end of the lunger, constitutes the marllhe s eeve is connected with the plunger for limited relative axial movements by means of screws 48 secured to the sleeve and extending into grooves 49 (Fig. 3) provided in the plunger.

50 represents a lever fulcrumed toa pin.

5l supported by a bracket 52 and has one arm connected to trunnions 53 provided on the plunger 44 while its other arm carries a Aroller 54 which tracks on a cam 55, Fig. 2,

mounted on the counter-shaft 28. As illustrated, this shaft has also mounted thereon cams 56 for actuating levers 57 fulcrumed to the pin 51 and connected to swivel blocks nions 60 provided on the sleeve`47. The

upper ends of rods 59 are screw-threaded for nuts 61 and a helical spring 62 is interposed between each of the swivel blocks 58 and 'a' shoulder 63 therebelow on the respective rod 59.

The levers 57 carry anti-friction rollers 64 totrack on the cams 56.

65 represent extensible springs connected with levers 50 and 57 for yieldingly maintaining the rollersv of the same in contact with the respective cams.

66 represents a chute into which the com pleted caps are ejected. 67 represents the fo'raminations provided in the Wheel rimvfor each mold for the escape of liquid from the material when subjected to pressure of the die. I

llhe operation of the machine is as follows:

The wheel 10 has imparted thereto inte-rmittent rotary movements by means of the pawl 23 and ratchet wheel 22. Flach such movement is of an amount sucient to give circumferential vmovement tothe wheel rim to advance one mold cavity out of axial alinement with the die members 44 and 47 and carry the following cavity into such relative position. When a mold cavity is brought intooperative position, or nearly so, with respect to the die, the latch element 37 overcomes the momentum of the wheel and whereupon the locking bolt 34 is aected to engage the wheel between two of the lugs 36 and positively secure the wheel to present a mold cavity 14 to the die. Meanwhile the cams 55 and 56 are influencing the levers 50 and 57 -to cause the plunger 44 and sleeve 47 to enter the mold cavity therebelow, discharge a uantity of material into the cavity and lina ly compress the same into its proper form and expel the greater part of the liquid component therefrom.

intacte More particularly, the plunger and sleeve,v comprising the die, descend in unison until they are a short way within a mold cavity, then the plunger 44 is protruded below the bottom of the sleeve 47 to uncover the openings 46 of the plunger.l When this occurs, a quantity ofthe material, or pulp, discharges to lill the cavity which'is unoccupied by the die whereupon the sleeve is moved downward to first close the openings 46. and after the screws 48 encounter the lower ends of the grooves 49, the plunger is carried with the sleeve into the position `\in which they are shown in Fig. 4.

When this occurs, the material is compressed bythe die and a large part ofthe water is driven from the material to escape through holes 67. The cam 55 is desirably arranged to inuence the plunger in beside accommodating themselves to slight variations in the quantities of the feed as well as to material of an unhomogeneous or lumpy character. C

After the apices 561, so to speak, of the cams 56 haverevolved from under the lever rollers 64, the springs 65 assert their power to cause nthelevers to elevate the diete withdraw the same into position shown in Figs. 1 and 3. When this occurs and subsequent to the disengagement of locking-bolt 34, the pawl 23 is affected to turn the wheel to replace a mold cavity containing a formed article by a cavity in which the next article is to be made, and so on.'

' 1n the rotary movements lof the wheel, -the articles are progressively carried in their vrespective cavities through the oven 40 to dry or indurate the artlcles. After leaving the oven, the articles are each in lll@ succession dislodged from the mold by the Lemos@ for eecting an axial movement of the plunger through the medium of the sleeve to compress said material Within the mold by means of both the sleeve and the plunger.

2. In a machine for the purposes specified, a Wheel provided With a series of mold cavities in its periphery, means to impart intermittent rotary movements to the Wheel, a tubular die, means for operating the latter whereby material is successively supplied to and compressed by the die in the respective mold cavities, and locking means for securing the Wheel in positions to successively present said mold cavities in operative p0- sitions with respect to the die.

3. Ina machine for the purposes specified, a die, a wheel provided with a series of mold cavities in its periphery, means to impart intermittent rotary movements to the Wheel, and locking means for securing the Wheel in positions to successively present said mold cavities in operative positions with respect to the die, and an oven through which the articles compressed in the mold cavities are progressively carried by the rotation of the wheel.

4. In a machine for the purposes specified, a die consisting of a tubular plunger and asleeve, a'vvheel provided with a series of mold cavities in its periphery, means to impart intermittent yrotary movements to the Wheel, locking means for securing the Wheel in positions to successively present said mold "cavities in operative positions with respect to the die, means to afford axial movements to both of the aforesaid die-parts whereby they are successively actuated to supply material into a mold cavity and then actuated in unison to compress such material, a stripper device provided for each of said cavities, and means rendered operative bythe rotation of the Wheel to actuate the respective strippers.

5. In a machine for the purposes specified, a die, a Wheel provided with a series of mold cavities in its periphery, means to impart intermittent rotary movements to the Wheel, locking means for securing the Wheel in positions to successively present said mold cavities in operative positions with respect to the die, which the articles compressed in the mold cavities are progressively carried by the rotation of the Wheel, and a stripper device provided for each of said cavities, and means rendered operative by the rotation of the Wheel to actuate the respective strippers subsequent to the associated mold cavities being carried through the oven.

Signed at Seattle, Wash., this 4th day of January 1915. y

HARRY C., AYERS'I.

Witnesses:

PIERRE BARNES, .c E. PETERSON.

an oven through 

